train~ help for a noob

Apologies in advance – I’m new to this.
I have tried to search for help on here and haven’t managed to find anything!

I’m sure what I am trying to achieve has a fairly simple explanation.

I’m using the train~ object to try and replecate a heart monitor with a ventilator (hospital sound effects).
I’ve used the train~ object to get the beep – no problem.

The ventilator sound is being generated with pink noise going through a filter which sounds great, but I wanted to add a smaller burst of pink noise at the end of the first which is filtered differently. Hard to put into words but quite simply -

Can I trigger a train~ object from the previous train~ object stopping?
I’m sure there’s a way to do this…

Here’s ma patch –

– Pasted Max Patch, click to expand. –

Copy all of the following text. Then, in Max, select New From Clipboard.